A device to prevent the deformation of the PTFE plate. The PTFE plate is inserted in the peripheral tube, and there is a gap between the outer wall of the PTFE tube and the inner wall of the peripheral tube. The PTFE plate includes The peripheral tube, PTFE tube and flange in the hot-melt device. The flange is tightly inserted into the inner wall of the end of the PTFE tube, and the inner wall of the end of the peripheral tube is tightly sleeved on the outer wall of the end of the PTFE tube.
A high-pressure injection head is spliced ??to the end of the peripheral tube, and the flange separates the high-pressure injection head from the peripheral tube; the utility model uses a flange to replace the traditional gasket, and improves the Teflon tube, peripheral tube and high-pressure injection The mounting structure of the head has a high-pressure injection head forming a communication channel with the inner wall of the flange and the inner wall of the Teflon tube. Effectively prevent the deformation of the PTFE tube, which can avoid the leakage of hot melt liquid and the blockage of the channel.